NOVA INFINITY CHUCK Quick Change (8012) with #3 Bowl Jaws & Insert for 1&rdquo; x8 tpi Quick Jaw Changes -less than 30 seconds with innovative slide and lock system #3 bowl jaws included - rated for bowls up to 20" Includes Woodworm Screw Includes 1" x 8tpi adapter to fit lathes with 1" x 8tpi spindles Nova 2 year warrantee